551425420 has 72 divisors (see below), whose sum is σ = 1450706544. Its totient is φ = 174513024.

The previous prime is 551425403. The next prime is 551425487. The reversal of 551425420 is 24524155.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8902 + ... + 34381.

It is an arithmetic number, because the mean of its divisors is an integer number (20148702).

Almost surely, 2^551425420 is an apocalyptic number.

It is an amenable number.

551425420 is an abundant number, since it is smaller than the sum of its proper divisors (899281124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551425420 is a wasteful number, since it uses less digits than its factorization.

551425420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43319 (or 43310 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 551425420 is about 23482.4491908319. The cubic root of 551425420 is about 820.0284642112.

Adding to 551425420 its reverse (24524155), we get a palindrome (575949575).

The spelling of 551425420 in words is "five hundred fifty-one million, four hundred twenty-five thousand, four hundred twenty".